Small molecule inhibitors of hiv proteases

ABSTRACT

Described herein are compounds, compositions, and methods for treating HIV and related diseases.

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims priority under 35 USC §119(e) to U.S. Provisional Application Ser. No. 61/021,702, filed Jan. 17, 2008, and U.S. Provisional Application Ser. No. 61/083,744, filed Jul. 25, 2008, the disclosures of which are incorporated herein by reference.

BACKGROUND

The AIDS epidemic is one of the more challenging problems in medicine in the 21st century (United Nations. 2004 Report on the global HIV/AIDS Epidemic: 4th global report. New York, U.S.A., 2004). The disclosure of the foregoing is incorporated herein in its entirety by reference. In addition, the entirety of the disclosures of each of the publications cited herein are also incorporated herein by reference. A retrovirus designated human immunodeficiency virus (HIV) is the etiological agent of the complex disease that includes progressive destruction of the immune system (acquired immune deficiency syndrome; AIDS) and degeneration of the central and peripheral nervous system. This virus was previously known as LAV, HTLV-III, or ARV. A common feature of retrovirus replication is the extensive post-translational processing of precursor polyproteins by a vitally encoded protease to generate mature vital proteins required for virus assembly and function. Inhibition of this processing prevents the production of normally infectious virus. For example, Kohl, N. E. et al., Proc Nat'l Acad Sci 85:4686 (1988) demonstrated that genetic inactivation of the HIV encoded protease resulted in the production of immature, non-infectious virus particles. These results indicate that inhibition of the HIV protease represents a viable method for the treatment of AIDS and the prevention or treatment of infection by HIV.

SUMMARY OF THE INVENTION

The invention described herein includes methods for treating HIV, AIDS, and AIDS-related diseases using the compounds described herein as well as known compounds that heretofore have not been used or described as being useful in the treatment of such diseases. In addition, the invention described herein includes compounds and compositions for treating patients in need of relief from HIV, AIDS, and AIDS-related diseases.

The compounds described herein may be used in the treatment of HIV, AIDS, and AIDS-related diseases. Without being bound by theory, it is suggested that the compounds described herein may exert their utility by the inhibition of proteases encoded by human immunodeficiency virus (HIV), such as HIV-1. The compounds or pharmaceutically acceptable salts thereof, are of value in the prevention of infection by HIV, the treatment of infection by HIV and the treatment of the resulting acquired immune deficiency syndrome (AIDS), either as compounds, the pharmaceutically acceptable salts, or pharmaceutical composition ingredients. It is appreciated that the compounds described herein may be used alone or in combination with other compounds useful for treating such diseases, including those compounds that may operate by the same or different modes of action. Further, it is appreciated that the compounds and compositions described herein may be administered alone or with other compounds and compositions, such as other antiviral agents, immunomodulators, antibiotics, vaccines, and the like.

In one illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions comprising compounds of the following formula (I)

or pharmaceutically acceptable salts thereof; wherein,

X¹ is a bond, O, or an optionally substituted nitrogen; X² is CO or SO₂;

R¹ is alkyl, cycloalkyl, heterocycle, alkenyl, heteroalkyl, cycloheteroalkyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, or alkylheteroaryl, each of which is optionally substituted;

R² is selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, arylalkoxy, amino, aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, and a pro-drug moiety, each of which is optionally substituted;

R³ is hydrogen or alkyl;

W, X, Y, and Z are each independently selected from the group consisting of a bond, O, S, S(O), SO₂, optionally substituted nitrogen, optionally substituted phosphorus, P(O)R⁴, P(O)OR⁴, and (CR⁴R⁵)_(m), where m is 1 to about 3, or Y and W and the attached atoms form an optionally substituted bicyclo-[3.2.1] ring system; providing that, when Z is O then W and Y are not O or S and when Y is O then X and Z are not O or S;

R⁴ and R⁵ are, in each instance, independently selected from the group consisting of hydrogen, alkyl, heteroalkyl, cycloheteroalkyl, alkenyl, alkoxy, optionally substituted amino, thioalkyl, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, hydroxyalkyl, alkoxyalkyl, aminoalkyl, nitrile, cyanoalkyl, carboxylic acid, or a derivative thereof, and alkylcarboxylic acid, or a derivative thereof, each of which is optionally substituted; and

Q is selected from the group consisting of —CH₂OR⁹, —CO₂R⁹, —CONR⁹R¹⁰, —C(O)SR⁹, —C(S)OR⁹, and —C(S)NR⁹R¹⁰; where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or one or both of R⁹ and R¹⁰ is a pro-drug moiety; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocycle.

In another illustrative embodiment, the methods described herein include compounds, and pharmaceutical compositions containing such compounds of the following formula (II):

and pharmaceutically acceptable salts thereof; wherein,

r is an integer from 0 to 2;

X¹ is a bond, O, or NR¹⁴; and X² is CO or SO₂;

R¹ is alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, or alkylheteroaryl, each of which is optionally substituted;

R² and R¹⁴ are in each instance independently selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, and optionally substituted heteroarylalkyl; either or both of R² and R¹⁴ is a pro-drug moiety;

R³ is hydrogen or alkyl;

W, X, Y, and Z are each independently selected from the group consisting of a bond, O, S, S(O), SO₂, NR⁴, PR⁴, P(O)R⁴, P(O)OR⁴, and (CR⁴R⁵)_(m), where m is 1 to about 3; providing that, when Z is O then W and Y are not O or S and when Y is O then X and Z are not O or S;

R⁴ and R⁵ are, in each instance, independently selected from the group consisting of hydrogen, alkyl, heteroalkyl, alkenyl, alkoxyl, optionally substituted amino, thioalkyl, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, (CH₂)_(p)OR⁸, (CH₂)_(p)N(R⁸)₂, (CH₂)_(p)CN, and (CH₂)_(p)CO₂R⁸, where R⁸ in each occurrence is independently selected from the group consisting of hydrogen, alkyl, optionally substituted arylalkyl, and a pro-drug moiety, p is an integer from 0 to 5; and

Q is selected from the group consisting of —CH₂OR⁹, —CO₂R⁹, —CONR⁹R¹⁰, —C(O)SR⁹, —C(S)OR⁹, and —C(S)NR⁹R¹⁰; where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or one or both of R⁹ and R¹⁰ is a pro-drug moiety; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocycle.

In another illustrative embodiment, Q is CO₂R⁹ in each of formula (I) and/or (II). In another illustrative embodiment, R¹ is optionally substituted aryl in each of formula (I) and/or (II). In another illustrative embodiment, X¹ is O in each of formula (I) and/or (II). In another illustrative embodiment, X¹ is a bond in each of formula (I) and/or (II). In another illustrative embodiment, X² is S(O)₂ in each of formula (I) and/or (II). In another illustrative embodiment, X² is C(O) in each of formula (I) and/or (II). In another illustrative embodiment, R² is H in each of formula (I) and/or (II). In another illustrative embodiment, R³ is H in each of formula (I) and/or (II). In another illustrative embodiment, W, X, Y, and Z are taken together with the attached carbons to form a 5 to 8 membered heterocycle containing 1 or 2 oxygen atoms, or 1 oxygen and 1 nitrogen atom, such as but not limited to tetrahydrofuran, dioxolane, tetrahydropyran, dioxane, morpholine, oxepane, each of which is optionally substituted, in each of formula (I) and/or (II). In another illustrative embodiment, R⁴ and R⁵ are each independently selected from H, alkyl, CN, aryl, heteroaryl, heteroalkyl, such as ethers, amines, and the like, arylalkyl, arylheteroalkyl, heterocyclyl, each of which is optionally substituted, in each of formula (I) and/or (II). In another illustrative embodiment, one or more of R⁴ and R⁵ is alkyl substituted with a carboxylic acid or derivative thereof in each of formula (I) and/or (II). It is to be understood that each of the foregoing illustrative embodiments may be combined with others in other embodiments of the invention described herein. Illustratively, in another embodiment, Q is CO₂R⁹, R¹ is optionally substituted aryl, X¹ is a bond, and X² is S(O)₂ in each of formula (I) and/or (II). Other combinations of the foregoing embodiments are also described herein.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions comprising compounds of the following formula

or pharmaceutically acceptable salts thereof; wherein,

X¹ is a bond, O, or an optionally substituted nitrogen; X² is CO or SO₂;

R¹ is alkyl, cycloalkyl, alkenyl, heteroalkyl, heterocyclyl, heterocyclylalkyl, aryl, arylalkyl, heteroaryl, or heteroarylalkyl, each of which is optionally substituted;

R³ is hydrogen or alkyl;

each of R^(4a), R^(4b), and R^(4c), and each of R^(5a)R^(5ba), and R^(5c) are independently selected in each instance from the group consisting of hydrogen, alkyl, heteroalkyl, alkenyl, alkoxy, amino, aminoalkyl, thioalkyl, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, hydroxyalkyl, nitrile, cyanoalkyl, carboxylic acid or a derivative thereof, and alkylcarboxylic acid or a derivative thereof, each of which is optionally substituted; or any two of R^(4a), R^(4b), R^(4c), R^(5a)R^(5ba), and R^(5c)R⁴ and R⁵ are taken together with the attached atoms to form a carbocycle or heterocycle; and

Q is a carboxylic acid or a derivative thereof.

In another illustrative embodiment, Q is CO₂R⁹ in each of formula (I), (II), and/or (III). In another illustrative embodiment, R¹ is optionally substituted aryl in each of formula (I), (II), and/or (III). In another illustrative embodiment, X¹ is O in each of formula (I), (II), and/or (III). In another illustrative embodiment, X¹ is a bond in each of formula (I), (II), and/or (III). In another illustrative embodiment, X² is S(O)₂ in each of formula (I), (II), and/or (III). In another illustrative embodiment, X² is C(O) in each of formula (I), (II), and/or (III). In another illustrative embodiment, R³ is H in each of formula (I), (II), and/or (III). It is to be understood that each of the foregoing illustrative embodiments may be combined with others in other embodiments of the invention described herein. Illustratively, in another embodiment, Q is CO₂R⁹, R¹ is optionally substituted aryl, X¹ is a bond, and X² is S(O)₂ in each of formula (I), (II), and/or (III). Other combinations of the foregoing embodiments are also described herein.

Without being bound by theory, it is suggested that in one aspect, the compounds described herein, may be inhibiting proteases required for effective viral replication by mimicking a transition state, such as the tetrahedral transition state of amide hydrolysis. Without being bound by theory, it is suggested that in another aspect, the compounds described herein, may be inhibiting or interfering with viral replication by inhibiting dimerization of the protease.

DETAILED DESCRIPTION

In one illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions comprising compounds of the following formula

and pharmaceutically acceptable salts thereof; wherein,

X¹ is a bond, O, or an optionally substituted nitrogen; X² is CO or SO₂;

R¹ is alkyl, cycloalkyl, alkenyl, heteroalkyl, heterocyclyl, heterocyclylalkyl, aryl, arylalkyl, heteroaryl, or heteroarylalkyl, each of which is optionally substituted;

R² is selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, arylalkoxy, amino, alkylthio, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, and pro-drug moieties, each of which is optionally substituted;

R³ is hydrogen or alkyl;

X, Y, and Z are taken together with the attached atoms to form a heterocycle or heterobicycle, each of which is optionally substituted;

R⁴ and R⁵ are, in each instance, independently selected from the group consisting of hydrogen, alkyl, heteroalkyl, alkenyl, alkoxy, amino, aminoalkyl, thioalkyl, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, hydroxyalkyl, nitrile, cyanoalkyl, carboxylic acid or a derivative thereof, and alkylcarboxylic acid or a derivative thereof, each of which is optionally substituted; or R⁴ and R⁵ are taken together with the attached atoms to form a carbocycle or heterocycle; and

Q is selected from the group consisting of heteroalkyl, hydroxyalkyl, and carboxylic acid or a derivative thereof.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions comprising compounds of the following formula

and pharmaceutically acceptable salts thereof; wherein,

X¹ is a bond, O, or an optionally substituted nitrogen; X² is CO or SO₂;

R¹ is alkyl, cycloalkyl, alkenyl, heteroalkyl, heterocyclyl, heterocyclylalkyl, aryl, arylalkyl, heteroaryl, or heteroarylalkyl, each of which is optionally substituted;

R³ is hydrogen or alkyl;

each of R^(4a), R^(4b), and R^(4c), and each of R^(5a)R^(5ba), and R^(5c) are independently selected in each instance from the group consisting of hydrogen, alkyl, heteroalkyl, alkenyl, alkoxy, amino, aminoalkyl, thioalkyl, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, hydroxyalkyl, nitrile, cyanoalkyl, carboxylic acid or a derivative thereof, and alkylcarboxylic acid or a derivative thereof, each of which is optionally substituted; or any two of R^(4a), R^(4b), R^(4c), R^(5a)R^(5ba), and R^(5c)R⁴ and R⁵ are taken together with the attached atoms to form a carbocycle or heterocycle; and

Q is a carboxylic acid or a derivative thereof.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein Z is selected from the group consisting of a bond, S(O), SO₂, optionally substituted nitrogen, and (CR⁴R⁵)_(m), where m is 1 to about 3. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein X and Y are each independently selected from the group consisting of a bond, O, S, S(O), SO₂, optionally substituted nitrogen, and (CR⁴R⁵)_(m), where m is 1 to about 3; providing that, when X is O then Y is not O or S and when Y is O then X is not O or S. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein W, X, Y, and Z are taken together with the attached carbons to form a 5 to 8 membered heterocycle containing 1 or 2 oxygen atoms. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein W, X, Y, and Z are taken together with the attached carbons to form a 5 to 8 membered heterocycle containing 1 oxygen and 1 nitrogen atom. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein the heterocycle is a tetrahydrofuran, dioxolane, tetrahydropyran, dioxane, morpholine, oxepane, each of which is optionally substituted.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein the heterobicycle is a oxabicyclo-[3.2.1]-octane, which is optionally substituted. In another embodiment, the optionally substituted oxabicyclo-[3.2.1]-octane is substituted with an optionally substituted fused phenyl.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein one of X, Y, or Z is O or NR^(2a), where R^(2a) is selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, arylalkoxy, amino, alkylthio, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, and pro-drug moieties, each of which is optionally substituted; and the others of X, Y, and Z are selected from the group consisting of a bond and (CR⁴R⁵)_(m), where m is 1 to about 3.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein X is O; and Y and Z are each (CR⁴R⁵)_(m), where m is 1 to about 3; and Z is a bond. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein Y is O; and X and Z are each (CR⁴R⁵)_(m), where m is 1 to about 3. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein one of X is O; Y is a bond, and Z is (CR⁴R⁵)_(m), where m is 1 to about 3. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein each of X, Y, and Z is (CR⁴R⁵)_(m), where m is 1. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein each of X and Y is (CR⁴R⁵)_(m), where m is 1; and Z is a bond.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein Q is selected from the group consisting of —CH₂OR⁹, —CO₂R⁹, —CONR⁹R¹⁰, —C(O)SR⁹, —C(S)OR⁹, and —C(S)NR⁹R¹⁰; where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or one or both of R⁹ and R¹⁰ is a pro-drug moiety; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocycle. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein Q is CO₂R⁹.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein R¹ is optionally substituted aryl.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein X¹ is O and X² is C(O). In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein X¹ is a bond. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein X² is S(O)₂. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein X¹ is a bond and X² is S(O)₂. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein X¹ is O. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein X² is C(O).

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein R² is H. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein R³ is H. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein R⁴ and R⁵ are each independently selected from H, alkyl, CN, aryl, heteroaryl, heteroalkyl, such as ethers, amines, and the like, arylalkyl, arylheteroalkyl, heterocyclyl, each of which is optionally substituted. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein one or more of R⁴ and R⁵ is alkyl substituted with a carboxylic acid or derivative thereof.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein Q is CO₂R⁹, R¹ is optionally substituted aryl, X¹ is a bond, and X² is S(O)₂.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions of the formula

and pharmaceutically acceptable salts thereof; wherein

R⁵ is selected from the group consisting of hydrogen, alkyl, heteroalkyl, cycloheteroalkyl, alkenyl, alkoxy, optionally substituted amino, thioalkyl, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, hydroxyalkyl, alkoxyalkyl, aminoalkyl, nitrile, cyanoalkyl, carboxylic acid, or a derivative thereof, and alkylcarboxylic acid, or a derivative thereof, each of which is optionally substituted;

R⁷ is selected from the group consisting of hydrogen, hydroxy, alkoxy optionally substituted alkyl, heteroalkyl, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted alkylheteroaryl, optionally substituted heteroarylalkyl, and NR⁹R¹⁰, where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocyclyl; and

R⁸ is selected from the group consisting of hydrogen, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, and alkylheteroaryl, each of which is optionally substituted;

R¹¹ is hydrogen, alkyl, arylalkyl or pro-drug moiety.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions comprising compounds of the following formula

and pharmaceutically acceptable salts thereof; wherein

X¹ is a bond, optionally substituted nitrogen or O;

R² is selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, arylalkoxy, amino, aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, and a pro-drug moiety, each of which is optionally substituted;

R⁵ is selected from the group consisting of hydrogen, alkyl, heteroalkyl, cycloheteroalkyl, alkenyl, alkoxy, optionally substituted amino, thioalkyl, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, hydroxyalkyl, alkoxyalkyl, aminoalkyl, nitrile, cyanoalkyl, carboxylic acid, or a derivative thereof, and alkylcarboxylic acid, or a derivative thereof, each of which is optionally substituted;

R⁷ is hydrogen, alkyl, alkenyl, heteroalkyl, alkylaryl, arylalkyl, alkylheteroaryl, heteroarylalkyl, alkoxy or NR⁹R¹⁰, each of which is optionally substituted, where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocycle; and

R⁸ is selected from the group consisting of hydrogen, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, and alkylheteroaryl, each of which is optionally substituted; and

R¹¹ is selected from the group consisting of hydrogen, alkyl, arylalkyl, and pro-drug moiety.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein R⁸ is aryl. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein R⁸ is naphthyl, quinolinyl or phenyl, each of which is optionally substituted.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions of the formula

and pharmaceutically acceptable salts thereof; wherein

R¹ is optionally substituted aryl; R² is selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, arylalkoxy, amino, aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, and a pro-drug moiety, each of which is optionally substituted;

R⁵ is selected from the group consisting of hydrogen, alkyl, heteroalkyl, cycloheteroalkyl, alkenyl, alkoxy, optionally substituted amino, thioalkyl, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, hydroxyalkyl, alkoxyalkyl, aminoalkyl, nitrile, cyanoalkyl, carboxylic acid, or a derivative thereof, and alkylcarboxylic acid, or a derivative thereof, each of which is optionally substituted;

R⁷ is hydrogen, alkyl, alkenyl, heteroalkyl, alkylaryl, arylalkyl, alkylheteroaryl, heteroarylalkyl, alkoxy or NR⁹R¹⁰, each of which is optionally substituted, where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocycle;

R¹² and R¹¹ are each independently selected from the group consisting of hydrogen, alkyl, arylalkyl and pro-drug moiety; and

R¹³ is from one to three substituents, each independently selected from the group consisting of hydrogen, alkyl, haloalkyl, heteroalkyl, halogen, arylalkyl, optionally substituted amino, alkoxyl, alkylsulfonyl, arylsulfonyl, alkylsulfinyl, arylsulfinyl, alkylthio, nitro, C(O)OR⁹ and C(O)NR⁹R¹⁰.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions comprising compounds of the following formula

and pharmaceutically acceptable salts thereof; wherein

R⁷ is independently selected in each instance from hydrogen, optionally substituted alkyl, heteroalkyl, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted alkylheteroaryl, optionally substituted heteroarylalkyl, OR⁹ or NR⁹R¹⁰, where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocycle; and R^(9a) is hydrogen, alkyl, arylalkyl or pro-drug.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions comprising compounds of the above wherein R¹ aryl or heteroaryl, each of which is optionally substituted.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions comprising compounds of the above formula wherein X¹ is a bond, O, or NR¹⁴; X² is CO or SO₂; R¹ is alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, or alkylheteroaryl, each of which is optionally substituted; R² is selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, and a pro-drug moiety; and R⁴ is aryl or heteroaryl, each of which is optionally substituted;

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions comprising compounds of the above formula wherein X¹ is a bond, O, or NR¹⁴; X² is CO or SO₂; and R¹ is alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, or alkylheteroaryl, each of which is optionally substituted; R² is hydrogen; R¹⁴ is selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, and a pro-drug moiety.

In another illustrative embodiment, the compounds of following formula are described

and pharmaceutically acceptable salts thereof; wherein

R¹ is optionally substituted aryl; R² is hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, or a pro-drug moiety;

R⁴ is selected from the group consisting of hydrogen, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, and alkylheteroaryl; R⁵ is selected from the group consisting of hydrogen, nitrile, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, alkylheteroaryl, (CH₂)p-OR⁸, (CH₂)p-CO₂R⁸, and (CH₂)p-NHR⁸, where p is an integer from 0 to 5, and R⁸ in each instance is independently selected from the group consisting of hydrogen, alkyl, optionally substituted arylalkyl, and pro-drug moiety; R⁷ is hydrogen, optionally substituted alkyl, heteroalkyl, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted alkylheteroaryl, optionally substituted heteroarylalkyl, OR⁹ or NR⁹R¹⁰, where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocycle; and R¹¹ is hydrogen, alkyl, arylalkyl or pro-drug moiety.

In another illustrative embodiment, the compounds of the following formula are described:

and pharmaceutically acceptable salts thereof; wherein

R¹ is alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, or alkylheteroaryl, each of which is optionally substituted;

R² and R⁴ are each independently selected in each instance from the group consisting of hydrogen, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, and alkylheteroaryl; R⁵ is selected from the group consisting of hydrogen, nitrile, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl; Q is an alcohol or a derivative thereof.

In another illustrative embodiment, the compounds of following formula are described

and pharmaceutically acceptable salts thereof; wherein

R¹ is optionally substituted aryl;

X¹ is a bond, NR¹⁴ or O; R² and R¹⁴ are in each instance independently selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, and a pro-drug moiety;

R⁴ is selected from the group consisting of hydrogen, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, and alkylheteroaryl;

R⁵ is selected from the group consisting of hydrogen, nitrile, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, alkylheteroaryl, (CH₂)p-OR⁸, (CH₂)p-CO₂R⁸, and (CH₂)p-NHR⁸, where p is an integer from 0 to 5, and R⁸ in each instance is independently selected from the group consisting of hydrogen, alkyl, optionally substituted arylalkyl, and pro-drug moiety, with the proviso that at least one of R⁴ or R⁵ is not hydrogen;

R⁷ is independently selected in each instance from hydrogen, optionally substituted alkyl, heteroalkyl, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted alkylheteroaryl, optionally substituted heteroarylalkyl, OR⁹ or NR⁹R¹⁰, where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocycle; and R¹¹ is hydrogen, alkyl, arylalkyl or pro-drug moiety.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein R⁵ is allyl or hydrogen.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions of the formula

and pharmaceutically acceptable salts thereof; wherein

R^(a) represents from 0 to 3 substituents independently selected in each instance from hydroxy, alkyl, heteroalkyl, alkoxy, aryl, arylalkyl, hydroxy, optionally substituted amino, and thioalkyl, each of which is optionally substituted, or two vicinal R^(a) together with the attached carbons form a fused ring.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein X² is SO₂; X¹ is a bond; R³ is hydrogen; R¹ is aryl; and Q is a carboxylic acid or a derivative thereof.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions of the formula

and pharmaceutically acceptable salts thereof; wherein

X¹ is a bond, O, or an optionally substituted nitrogen; X² is CO or SO₂;

R¹ is alkyl, cycloalkyl, alkenyl, heteroalkyl, heterocyclyl, heterocyclylalkyl, aryl, arylalkyl, heteroaryl, or heteroarylalkyl, each of which is optionally substituted;

R³ is hydrogen or alkyl;

each of R^(4a), R^(4b), and R^(4c), and each of R^(5a)R^(5ba), and R^(5c) are independently selected in each instance from the group consisting of hydrogen, alkyl, heteroalkyl, alkenyl, alkoxy, amino, aminoalkyl, thioalkyl, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, hydroxyalkyl, nitrile, cyanoalkyl, carboxylic acid or a derivative thereof, and alkylcarboxylic acid or a derivative thereof, each of which is optionally substituted; or any two of R^(4a), R^(4b), R^(4c), R^(5a)R^(5ba), and R^(5c)R⁴ and R⁵ are taken together with the attached atoms to form a carbocycle or heterocycle; and

Q is a carboxylic acid or a derivative thereof.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein Q is selected from the group consisting of —CH₂OR⁹, —CO₂R⁹, —CONR⁹R¹⁰, —C(O)SR⁹, —C(S)OR⁹, and —C(S)NR⁹R¹⁰; where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or one or both of R⁹ and R¹⁰ is a pro-drug moiety; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocycle. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein Q is CO₂R⁹.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein R¹ is optionally substituted aryl. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein R¹ is substituted phenyl. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein R¹ is optionally substituted aryl.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein X¹ is O and X² is C(O). In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein X¹ is a bond. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein X² is S(O)₂. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein X¹ is a bond and X² is S(O)₂. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein X¹ is O. In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein X² is C(O).

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions wherein R³ is H.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions comprising compounds of the following formula

and pharmaceutically acceptable salts thereof; wherein

X¹ is a bond, O, or an optionally substituted nitrogen; X² is CO or SO₂;

R¹ is alkyl, cycloalkyl, alkenyl, heteroalkyl, heterocyclyl, heterocyclylalkyl, aryl, arylalkyl, heteroaryl, or heteroarylalkyl, each of which is optionally substituted;

R² is selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, arylalkoxy, amino, alkylthio, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, and pro-drug moieties, each of which is optionally substituted;

R³ is hydrogen or alkyl;

X, Y, and Z are taken together with the attached atoms to form a heterocycle or heterobicycle, each of which is optionally substituted;

R⁴ and R⁵ are, in each instance, independently selected from the group consisting of hydrogen, alkyl, heteroalkyl, alkenyl, alkoxy, amino, aminoalkyl, thioalkyl, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, hydroxyalkyl, nitrile, cyanoalkyl, carboxylic acid or a derivative thereof, and alkylcarboxylic acid or a derivative thereof, each of which is optionally substituted; or R⁴ and R⁵ are taken together with the attached atoms to form a carbocycle or heterocycle; and

Q is selected from the group consisting of heteroalkyl, hydroxyalkyl, and carboxylic acid or a derivative thereof;

providing that the compound is not a compound of the formulae

wherein R⁵ is hydrogen, cyano or CH₂CH═CH₂; n is 1 or 2; R^(x) is 1-naphthyl or phenyl; and R^(y) is tosyl or hydrogen.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions comprising compounds of the following formula

and pharmaceutically acceptable salts thereof; wherein

X¹ is a bond, O, or NR¹⁴; X² is CO or SO₂;

R¹ is alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, or alkylheteroaryl, each of which is optionally substituted;

R² and R¹⁴ are in each instance independently selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, and a pro-drug moiety;

R⁴ is selected from the group consisting of hydrogen, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, and alkylheteroaryl;

R⁵ is selected from the group consisting of hydrogen, nitrile, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, alkylheteroaryl, (CH₂)p-OR⁸, (CH₂)p-CO₂R⁸, and (CH₂)p-NHR⁸, where p is an integer from 0 to 5, and R⁸ in each instance is independently selected from the group consisting of hydrogen, alkyl, optionally substituted arylalkyl, and pro-drug moiety;

R⁷ is hydrogen, optionally substituted alkyl, heteroalkyl, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted alkylheteroaryl, optionally substituted heteroarylalkyl, OR⁹ or NR⁹R¹⁰, where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocycle; and R^(9a) is hydrogen, alkyl, arylalkyl or pro-drug

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions comprising compounds of the above wherein R¹ aryl or heteroaryl, each of which is optionally substituted.

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions comprising compounds of the above formula wherein X¹ is a bond, O, or NR¹⁴; X² is CO or SO₂; R¹ is alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, or alkylheteroaryl, each of which is optionally substituted; R² is selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, and a pro-drug moiety; and R⁴ is aryl or heteroaryl, each of which is optionally substituted;

In another illustrative embodiment, the methods described herein include compounds and pharmaceutical compositions comprising compounds of the above formula wherein X¹ is a bond, O, or NR¹⁴; X² is CO or SO₂; and R¹ is alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, or alkylheteroaryl, each of which is optionally substituted; R² is hydrogen; R¹⁴ is selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, and a pro-drug moiety.

In another illustrative embodiment, the compounds of following formula are described;

wherein R¹ is optionally substituted aryl; R² is hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, or a pro-drug moiety;

R⁴ is selected from the group consisting of hydrogen, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, and alkylheteroaryl; R⁵ is selected from the group consisting of hydrogen, nitrile, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, alkylheteroaryl, (CH₂)p-OR⁸, (CH₂)p-CO₂R⁸, and (CH₂)p-NHR⁸, where p is an integer from 0 to 5, and R⁸ in each instance is independently selected from the group consisting of hydrogen, alkyl, optionally substituted arylalkyl, and pro-drug moiety; R⁷ is hydrogen, optionally substituted alkyl, heteroalkyl, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted alkylheteroaryl, optionally substituted heteroarylalkyl, OR⁹ or NR⁹R¹⁰, where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocycle; and R¹¹ is hydrogen, alkyl, arylalkyl or pro-drug moiety.

In another illustrative embodiment, the compounds of the following formula are described:

wherein R¹ is alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, or alkylheteroaryl, each of which is optionally substituted;

R² and R⁴ are each independently selected in each instance from the group consisting of hydrogen, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, and alkylheteroaryl; R⁵ is selected from the group consisting of hydrogen, nitrile, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl; Q is an alcohol or a derivative thereof.

In another illustrative embodiment, the compounds of following formula are described;

wherein R¹ is optionally substituted aryl;

X¹ is a bond, NR¹⁴ or O; R² and R¹⁴ are in each instance independently selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, and a pro-drug moiety;

R¹ is optionally substituted aryl;

X¹ is a bond, NR¹⁴ or O; R² and R¹⁴ are in each instance independently selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, and a pro-drug moiety;

R⁷ is hydrogen, optionally substituted alkyl, heteroalkyl, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted alkylheteroaryl, optionally substituted heteroarylalkyl, OR⁹ or NR⁹R¹⁰, where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocycle; and R¹¹ is hydrogen, alkyl, arylalkyl or pro-drug moiety.

As used herein the term amino generally refers to primary, secondary, and tertiary amino groups, including but not limited to NH2, alkylamino, dialkylamino, arylalkylamino, and the like.

As used herein the term carboxylic acid derivative generally refers to esters, amides, including primary, secondary, and tertiary amides, acyl hydrazides, hydroxamic acids and esters, cyano, and the like.

As used herein the term heteroalkyl generally refers to straight-chain or branched alkyl groups where one or more carbon atoms are replaced by a heteroatom, such as oxygen, nitrogen, sulfur, and the like, and includes but is not limited to alkoxyalkyl, alkylaminoalkyl, alkylaminoalkyloxyalkyl, alkylthioalkyl, and the like.

As used herein the term substituted when applied to aryl, heteroaryl, and the like generally refers to halo, alkyl, alkoxy, heteroalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, hydroxy, amino, alkyl and aryl sulfonyl, sulfonamide, and the like]

As used herein the term substituted when applied to alkyl, heteroalkyl, cycloalkyl, and the like generally refers to halo, alkyl, alkoxy, heteroalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, hydroxy, amino, alkyl and aryl sulfonyl, sulfonamide, and the like]

In another embodiment, optional substituents in each of the foregoing include those found on optionally substituted aryl and heteroaryl include one or more groups selected from alkyl, alkoxy, amino, which may be mono or dialkylated, or acylated, aryl, arylalkyl, halo, heteroalkyl, heteroalkoxy, cyano, nitro, and the like. In one embodiment, heteroalkyl includes alkoxylalkyl, aminoalkyl, where the amino group may be mono or dialkylated, or acylated, haloalkyl, haloalkoxyalkyl, and the like.

The above formula includes compounds that are described in Ghosh et al. (Organic Letters 7:7-10 (2005)), the entirety of the disclosure of which is incorporated herein by reference. Ghosh et al. also described suitable methods for preparing the compounds described herein. As such, the compounds described in Ghosh et al. are not included in the novel compounds described herein. However, the compounds of Ghosh et al. are included in the methods described herein for treating HIV, AIDS, and related diseases and disease states.

In one embodiment of the compounds described herein, the following compounds are not included:

where Ts=tosyl, Ph=phenyl, Np=naphthyl, and R═H, CN, or allyl. In one illustrative embodiment of the methods described herein, one or more of the foregoing compounds is included in the pharmaceutical compositions or used in the methods described herein, including the corresponding carboxylic acids and derivatives thereof, including thiocarboxylic acids and esters, thionocarboxylic acids and esters, amides, thioamides, and the like.

In another illustrative embodiment, the compounds of the following formula are described:

wherein R is alkyl, including methyl, amino, or alkoxy, including methoxy.

In another illustrative embodiment, the compounds of the following formula are described:

wherein R=alkyl; R⁴=Ph, Ar, alkyl, heteroalkyl or heteroaryl group, and

R⁵=alkyl, including Me;

R=alkoxy, including methoxy; R⁴=Ph, Ar, alkyl, heteroalkyl and heteroaryl group, and

R⁵=alkyl, including Me; R⁴=Ph, Ar, alkyl, heteroalkyl and heteroaryl group;

R═NH₂; R⁴=Ph, Ar, alkyl, heteroalkyl and heteroaryl group, and

R⁵=alkyl, including Me; R⁴=Ph, Ar, alkyl, heteroalkyl and heteroaryl group; or

R═R⁴=Ph, Ar, alkyl, heteroalkyl and heteroaryl group, and

R⁵=alkyl, including Me; R⁴=Ph, Ar, alkyl, heteroalkyl and heteroaryl group.

In another illustrative embodiment, the compounds of the following formulae are described:

where Ts is a tosyl group (4-Me-PhSO₂).

In another illustrative embodiment, the compounds of the following formula are described:

wherein R=hydrogen or alkyl; R¹=hydrogen, Ph, Ar, alkyl, heteroalkyl or heteroaryl group, and R²=alkyl, including Me; R¹=Ph, Ar, alkyl, heteroalkyl and heteroaryl group; or

R=alkoxy, including methoxy; and R²=alkyl, including Me; R¹=Ph, Ar, alkyl, heteroalkyl and heteroaryl group; or

R═NH₂; R¹=Ph, Ar, alkyl, heteroalkyl and heteroaryl group, and R²=alkyl, including Me; or

R═R¹=Ph, Ar, alkyl, heteroalkyl and heteroaryl group, and R²=alkyl, including Me; R¹=Ph, Ar, alkyl, heteroalkyl and heteroaryl group.

In another illustrative embodiment, the compounds of the following formulae are described:

In another illustrative embodiment, the compounds of the following formula are described:

wherein, for example, R═H, CN, (CH₂)p-OR⁸, (CH₂)p-CO₂R⁸, (CH₂)p-NHR⁸, and the like; p is an integer from 0 to 5; where R⁸ in each occurrence is independently selected from hydrogen, alkyl, and optionally substituted arylalkyl, or one or more R⁸ is a pro-drug moiety.

In another illustrative embodiment, the compounds of the following formula are described:

wherein, for example, R═H, CN, (CH₂)p-OR⁸, (CH₂)p-CO₂R⁸, (CH₂)p-NHR⁸, and the like, where p is an integer from 0 to 5; and R⁸ in each occurrence is independently selected from H, alkyl, and optionally substituted arylalkyl, or one or more R⁸ is a pro-drug moiety.

In another illustrative embodiment, the compounds of the following formulae are described:

wherein X is selected from O, S, S(O), SO₂, NR⁴, PR⁴, P(O)R⁴, P(O)OR⁴, and C(R⁴R⁵); and is illustratively O.

Ar=Ph, or substituted phenyl, such as, but not limited to alkoxyphenyl, including p-, m-, and o-anisolyl, 3,4-benzodioxanyl, 3,4-benzodioxolanyl, and the like;

R¹═H, alkyl, NH₂, alkoxy, CH₂OH;

R²═H, CH₂CHMe₂, (CH₂)₂CHMe₂; and

R═OH, OR⁸, NHR⁸, wherein each occurrence is independently selected from H, alkyl, such as, but not limited to, methyl and ethyl, and optionally substituted arylalkyl including, but not limited to, benzyl, or one or more R⁸ is a pro-drug moiety.

In another illustrative embodiment, the compounds of the following formulae are described;

In another illustrative embodiment, the compounds of following formulae are described;

In another illustrative embodiment, the compounds of the following formulae are described;

In another illustrative embodiment, the compounds of the following formula are described:

R¹ is optionally substituted aryl; R² is hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, or a pro-drug moiety; R⁵ is selected from the group consisting of hydrogen, nitrile, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, alkylaryl, arylalkyl, heteroaryl, heteroarylalkyl, and alkylheteroaryl; R⁷ is hydrogen, optionally substituted alkyl, heteroalkyl, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted alkylheteroaryl, optionally substituted heteroarylalkyl, OR⁹ or NR⁹R¹⁰; where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocycle; R¹² and R¹¹ are each independently selected from the group consisting of hydrogen, alkyl, arylalkyl and pro-drug moiety; and R¹³ is from one to three substituents independently selected from the group consisting of hydrogen, alkyl, haloalkyl, heteroalkyl, halogen, arylalkyl, optionally substituted amino, alkoxyl, alkylsulfonyl, arylsulfonyl, alkylsulfinyl, arylsulfinyl, alkylthio, nitro, C(O)OR⁹ and C(O)NR⁹R¹⁰.

In another illustrative embodiment, the compounds of the following formula are described:

In another illustrative embodiment, the compounds of the following formula are described:

R¹ is optionally substituted aryl; R² is hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, or a pro-drug moiety; R⁵ is selected from the group consisting of hydrogen, nitrile, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, alkylaryl, arylalkyl, heteroaryl, heteroarylalkyl, and alkylheteroaryl; R⁷ is hydrogen, optionally substituted alkyl, heteroalkyl, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted alkylheteroaryl, optionally substituted heteroarylalkyl, OR⁹ or NR⁹R¹⁰; where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocycle; R¹² and R¹¹ are each independently selected from the group consisting of hydrogen, alkyl, arylalkyl and pro-drug moiety; and R¹³ is hydroxyl or OR⁹.

In another illustrative embodiment, the compounds of the following formula are described:

R¹ is optionally substituted aryl; R² is hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, or a pro-drug moiety; and R⁵ is selected from the group consisting of hydrogen, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, alkylaryl, arylalkyl, heteroaryl, heteroarylalkyl, and alkylheteroaryl.

In another illustrative embodiment, the compounds of the following formula are described:

R¹ is optionally substituted aryl; R² is hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, or a pro-drug moiety; R⁵ is selected from the group consisting of hydrogen, nitrile, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, alkylaryl, arylalkyl, heteroaryl, heteroarylalkyl, and alkylheteroaryl; R⁹ is selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; R¹² and R¹¹ are each independently selected from the group consisting of hydrogen, alkyl, arylalkyl and pro-drug moiety.

In another illustrative embodiment, the compounds of the following formula are described

R⁵ is selected from the group consisting of hydrogen, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, alkylaryl, arylalkyl, heteroaryl, heteroarylalkyl, and alkylheteroaryl; and X is hydroxyl or amino.

In another illustrative embodiment, the compounds of the following formula are described

X is hydroxyl or amino.

In another illustrative embodiment, the compounds of the following formula are described:

R² is hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, optionally substituted arylalkoxy, optionally substituted amino, optionally substituted aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, or a pro-drug moiety; R⁵ is selected from the group consisting of hydrogen, nitrile, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, alkylaryl, arylalkyl, heteroaryl, heteroarylalkyl, and alkylheteroaryl; R¹² and R¹¹ are each independently selected from the group consisting of hydrogen, alkyl, arylalkyl and pro-drug moiety; and R¹³ is from one to three substituents independently selected from the group consisting of hydrogen, alkyl, heteroalkyl, halogen, arylalkyl, optionally substituted amino, alkoxyl, alkylsulfonyl, arylsulfonyl, alkylsulfinyl, arylsulfinyl, alkylthio, nitro, C(O)OR⁹ and

C(O)NR⁹R¹⁰, where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl.

In another illustrative embodiment, the compounds of the following formula are described:

In another illustrative embodiment, the compounds of the following formula are described:

wherein Ar in an optionally substituted aryl group, Ph, alkoxyphenyl, including p, m, and o-anisole, 3,4-benzodioxan, 3,4-benzodioxolan, and the like;

R¹═NH₂, alkoxy, CH₂OH, and the like;

R²═H, CH₂CHMe₂, (CH2)₂CHMe₂, and the like; and

R═OH, OR⁸, NHR⁸, wherein R⁸ in each occurrence is independently selected from hydrogen, alkyl, including methyl and ethyl, and optionally substituted arylalkyl including benzyl, or one or more R⁸ is a pro-drug moiety.

In another illustrative embodiment, the compounds of the following formula are described:

wherein R═OH, OR⁸, NHR⁸, wherein R⁸ in each occurrence is independently selected from hydrogen, alkyl, including methyl and ethyl, and optionally substituted arylalkyl including benzyl, or one or more R⁸ is a pro-drug moiety.

It is also appreciated that in the foregoing embodiments, certain aspects of the compounds are presented in the alternative, such as selections for any one or more of R, X¹, X², R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, R¹², n, m, and p. It is therefore to be understood that various alternate embodiments of the invention include individual members of those lists, as well as the various subsets of those lists. Each of those combinations is to be understood to be described herein by way of the lists.

In one embodiment, the following illustrative method for preparing compounds described herein is as follows:

as described by Ghosh et al. It is to be understood that the above synthetic method is adaptable to prepare the entire range of compounds described herein by the appropriate selection of the corresponding starting material, or protected variation thereof.

It is to be understood that in each illustrative embodiment described herein that includes one or more compounds having chiral centers, all possible diastereomers and enantiomers are described by the structures both collectively as various mixtures, including racemic mixtures, as well as individually as optically active compounds. Where stereochemistry is indicated in illustrative structures, it is to be understood that the indicated stereochemistry is relative and therefore refers only to those selected diastereomers. In addition, in some cases compounds showing relative chemistry refer both the racemic mixtures as well as optically enriched or optically pure enantiomers. As described herein, the preparations, processes, and syntheses for preparing such compounds may be performed using optically enriched or optically pure starting materials, or in the alternative reaction conditions that allow for the asymmetric induction of certain chiral centers.

In another embodiment, compounds of the present invention can be prepared and administered in a wide variety of oral, parenteral and topical dosage forms. Thus, the compounds of the present invention can be administered by injection (e.g. intravenously, intramuscularly, intracutaneously, subcutaneously, intraduodenally, or intraperitoneally). Also, the compounds described herein can be administered by inhalation, for example, intranasally. Additionally, the compounds of the present invention can be administered transdermally. It is also envisioned that multiple routes of administration (e.g., intramuscular, oral, transdermal) can be used to administer the compounds of the invention. Accordingly, the present invention also provides pharmaceutical compositions comprising a pharmaceutically acceptable carrier or excipient and one or more compounds of the invention.

In another embodiment, compounds of the present invention can be prepared and administered in a wide variety of oral, parenteral and topical dosage forms. Thus, the compounds of the present invention can be administered by injection (e.g. intravenously, intramuscularly, intracutaneously, subcutaneously, intraduodenally, or intraperitoneally). Also, the compounds described herein can be administered by inhalation, for example, intranasally. Additionally, the compounds of the present invention can be administered transdermally. It is also envisioned that multiple routes of administration (e.g., intramuscular, oral, transdermal) can be used to administer the compounds of the invention. Accordingly, the present invention also provides pharmaceutical compositions comprising a pharmaceutically acceptable carrier or excipient and one or more compounds of the invention.

For the treatment of HIV, AIDS, and AIDS-related diseases, illustratively the compounds described herein may be formulated in a therapeutically effective amount in conventional dosage forms, including one or more carriers, diluents, and/or excipients. Such formulation compositions may be administered by a wide variety of conventional routes in a wide variety of dosage formats, utilizing art-recognized products. See generally, Remington's Pharmaceutical Sciences, (16th ed. 1980). It is to be understood that the compositions described herein may be prepared from isolated compounds described herein or from salts, solutions, hydrates, solvates, and other forms of the compounds described herein. It is also to be understood that the compositions may be prepared from various amorphous, non-amorphous, partially crystalline, crystalline, and/or other morphological forms of the compounds described herein.

In making the formulations of the compounds described herein, a therapeutically effective amount of the HIV protease inhibitor, in any of the various forms described herein, may be mixed with an excipient, diluted by an excipient, or enclosed within such a carrier which can be in the form of a capsule, sachet, paper, or other container. Excipients may serve as a diluent, and can be solid, semi-solid, or liquid materials, which act as a vehicle, carrier or medium for the active ingredient. Thus, the formulation compositions can be in the form of tablets, pills, powders, lozenges, sachets, cachets, elixirs, suspensions, emulsions, solutions, syrups, aerosols (as a solid or in a liquid medium), ointments, soft and hard gelatin capsules, suppositories, sterile injectable solutions, and sterile packaged powders. The compositions may contain anywhere from about 0.1% to about 99.9% active ingredients, depending upon the selected dose and dosage form. Some examples of suitable excipients include lactose, dextrose, sucrose, sorbitol, mannitol, starches, gum acacia, calcium phosphate, alginates, tragacanth, gelatin, calcium silicate, microcrystalline cellulose, polyvinylpyrrolidone, cellulose, water, syrup, and methyl cellulose. The formulations can additionally include: lubricating agents such as talc, magnesium stearate, and mineral oil; wetting agents; emulsifying and suspending agents; preserving agents such as methyl- and propylhydroxybenzoates; sweetening agents; and flavoring agents. The compositions can be formulated so as to provide quick, sustained or delayed release of the active ingredient after administration to the patient by employing procedures known in the art. It is appreciated that the carriers, diluents, and excipients used to prepare the compositions described herein are advantageously GRAS (Generally Regarded as Safe) compounds.

The unitary daily dosage of the compounds described in the invention can vary significantly depending on the host condition, the disease state being treated, the molecular weight of the conjugate, its route of administration and tissue distribution, and the possibility of co-usage of other therapeutic treatments such as radiation therapy. The effective amount to be administered to a patient is based on body surface area, patient weight, and physician assessment of patient condition. An effective dose can range from about 1 ng/kg to about 50 mg/kg, from about 10 ng/kg to about 10 mg/kg, from about 0.10 μg/kg to about 10 mg/kg, from about 1 μg/kg to about 5 mg/kg, and from about 10 μg/kg to about 5 mg/kg.

Any effective regimen for administering the composition comprising a compound of the invention can be used. For example, the composition comprising a compound of the invention can be administered as single doses, or it can be divided and administered as a multiple-dose daily regimen. Further, a staggered regimen, for example, one to three days per week can be used as an alternative to daily treatment, and for the purpose of defining this invention such intermittent or staggered daily regimen is considered to be equivalent to every day treatment and within the scope of this invention.

The compounds described herein may contain one or more chiral centers, or may otherwise be capable of existing as multiple stereoisomers. Accordingly, it is to be understood that the present invention includes pure stereoisomers as well as mixtures of stereoisomers, such as enantiomers, diastereomers, and enantiomerically or diastereomerically enriched mixtures. The compounds described herein may be capable of existing as geometric isomers. Accordingly, it is to be understood that the present invention includes pure geometric isomers or mixtures of geometric isomers.

It is appreciated that the compounds described herein may exist in unsolvated forms as well as solvated forms, including hydrated forms. In general, the solvated forms are equivalent to unsolvated forms and are encompassed within the scope of the present invention. The compounds of the present invention may exist in multiple crystalline or amorphous forms. In general, all physical forms are equivalent for the uses contemplated by the present invention and are intended to be within the scope of the present invention.

Additional features of the present invention will become apparent to those skilled in the art upon consideration of the following description of illustrative embodiments for carrying out the invention.

EXAMPLES

General. All melting points were recorded on a Thomas-Hoover melting point apparatus and are uncorrected. ¹H NMR and C NMR spectra were recorded on Varian Mercury-Vx-300, Bruker Avance 400, Bruker AV-500, Bruker Avance DRX-500 spectrometers. IR spectra were recorded on a Mattson Genesis II FT-IR spectrometer. Optical rotations were recorded on a Perkin-Elmer 341 or an Autopol III automeric polarimeter. Anhydrous solvents were obtained as follow: THF and diethyl ether by distillation from sodium and benzophenone; pyridine, dichloromethane from CaH₂. All other solvents were reagent grade. All moisture sensitive reactions were carried out in a flame dried flask under nitrogen atmosphere. Column chromatography was performed with Whatman 240-400 mesh silica gel under low pressure of 3-5 psi. TLC was carried out with E. Merck silica gel 60-F-254 plates. Ethyl α-N-tosyl iminoacetate was prepared from ethyl glyoxylate and N-toluenesulfonylisocyanate (Sigma-Aldrich) by Weinreb's procedure (Tschaen, D. H.; Turos, E.; Weinreb, S. M. J. Org. Chem. 1984, 49, 5058).

Example 1

(±)(R)-Ethyl 2-((R)-tetrahydrofuran-3-yl)-2-(tosylamino)acetate (3).

To a mixture of freshly distilled ethyl α-N-tosyl iminoacetate, (1), (255 mg, 1.0 mmol) and 2,3-dihydrofuran (84.2 mg, 1.2 mmol) in dry CH₂Cl₂ (6.0 mL) at −78° C. was added a solution of TiCl₄ (1.0 M in CH₂Cl₂, 1.2 mmol) and the resulting yellow solution containing some precipitate were stirred at −78° C. for an hour. Triethylsilane (581.4 mg, 5.0 mmol) was added to the mixture at −78° C. and the mixture was continuously stirred at −78° C. for 2.0 hours. Saturated sodium bicarbonate solution (15 mL) was used to quench the reaction at −78° C. The mixture was allowed to warm to room temperature and the aqueous layer was extracted with ethyl acetate (3×15 mL). The combined organic extracts were dried over Na₂SO₄ and concentrated under reduced pressure. The residue was further purified by flash column chromatography on silica gel to afford the α-N-tosylamino ester (3) (232.7 mg, 71% yield) as a white solid, Mp=104-105° C.; R_(f)=0.29 (40% EtOAc in hexane). ¹H NMR (500 MHz, CDCl₃): δ 1.07 (t, J=7.2 Hz, 3H), 1.84 (m, 1H), 1.97 (m, 1H), 2.41 (s, 3H), 2.49 (m, 1H), 3.64 (m, 1H), 3.72 (m, 2H), 3.78 (m 1H), 3.87 (m, 1H), 3.88 (q, J=7.2 Hz, 2H), 5.22 (d, J=7.0 Hz, 1H), 7.35 (d, J=8.3 Hz, 2H), 7.70 (d, J=8.3 Hz, 2H); ¹³C NMR (125 MHz, CDCl₃) δ 14.3, 21.9, 28.9, 42.9, 57.4, 62.2, 68.1, 69.7, 127.7, 130.1, 136.9, 144.2, 171.4. IR (film, NaCl), 559.1, 667.8, 816.1, 916.6, 1092.0, 1163.5, 1338.9, 1457.3, 1738.4, 2825.0 cm; ⁻¹m/z (ESI) 328.1 (M+H)⁺.

Example 2

(±) (R)-Ethyl 2-((2R,3R)-2-allyl-tetrahydrofuran-3-yl)-2-(tosylamino)acetate (5a) and (±) (R)-ethyl 2-((2S,3R)-2-allyl-tetrahydrofuran-3-yl)-2-(tosylamino)acetate (6a). To a mixture of freshly distilled α-N-tosyl imino ester 1 (255 mg, 1.0 mmol) and 2,3-dihydrofuran (90.7 mg, 1.2 mmol) in dry CH₂Cl₂ (6.0 mL) at −78° C. was added a solution of TiCl₄ (1.0 M in CH₂Cl₂, 1.2 mmol) and the resulting yellow solution containing some precipitate were stirred at −78° C. for an hour. Allyltrimethylsilane (229 mg, 2.00 mmol) was added to the mixture at −78° C. and mixture was continuously stirred at −78° C. for 2 hours. Saturated sodium bicarbonate solution (15 mL) was used to quench the reaction at −78° C. The mixture was allowed to warm to room temperature and the aqueous layer was extracted with ethyl acetate (3×15 mL). The combined organic extracts were dried over Na₂SO₄ and concentrated under reduced pressure. The residue was further purified by flash column chromatography on silica gel to afford the α-N-tosylamino ester 5a (219 mg, 59% yield) and 6a (72.0 mg, 20% yield). Major isomer (±) (R)-ethyl 2-((2R,3R)-2-allyl-tetrahydrofuran-3-yl)-2-(tosylamino)acetate (5a): white crystals, Mp=62-64° C.; R_(f)=0.24 (30% EtOAc in hexane). ¹H NMR (500 MHz, CDCl₃): δ 1.06 (t, J=7.2 Hz, 3H), 1.82 (m, 2H), 2.21 (m, 3H), 2.40 (s, 3H), 3.85-3.72 (m, 4H), 3.90 (q, J=7.2 Hz, 2H), 5.08 (m, 2H), 5.39 (d, J=10.2 Hz, 1H), 5.77 (m, 1H), 7.28 (d, J=8.1 Hz, 2H), 7.69 (d, J=8.1 Hz, 2H); ¹³C NMR (75 MHz, CDCl₃), δ 13.9, 21.5, 27.7, 38.4, 46.1, 56.0, 61.9, 66.7, 79.0, 117.4, 127.4, 129.7, 134.3, 136.4, 143.9, 170.9; FT-IR (film, NaCl), 668.9, 916.8, 1091.4, 1162.8, 1265.0, 1445.3, 1738.3.2923.2, 2974.2 cm⁻¹; m/z (ESI) 390.2 (M⁺+Na); HRMS (EST), Calcd for C₁₈H₂₅NO₅S: m/z 390.1351 (M+Na)⁺. found m/z 390.1343 (M+Na)⁺. Minor isomer (±) (R)-ethyl 2-((2S,3R)-2-allyl-tetrahydrofuran-3-yl)-2-(tosylamino)acetate (6a): wax solid; R_(f)=0.20 (30% EtOAc in hexane); ¹H NMR (300 MHz, CDCl₃) δ 1.12 (t, J=7.2 Hz, 3H), 2.04 (m, 2H), 2.23 (m, 2H), 2.42 (s, 3H), 2.48 (m, 1H), 3.79 (m, 2H), 3.95 (m, 4H), 5.04 (m, 2H), 5.20 (d, J=7.8 Hz, 1H), 5.78 (m, 1H), 7.30 (d, J=8.1 Hz, 2H), 7.73 (d, J=8.1 Hz, 2H); ¹³C NMR (75 MHz, CDCl₃), δ 13.9, 21.5, 27.4, 33.7, 44.2, 55.7, 61.7, 66.0, 79.6, 117.0, 126.5, 127.4, 129.6, 134.8, 136.1, 143.8, 171.1; FT-IR (film, NaCl), 665.3, 814.7, 1091.2, 1162.5, 1338.3, 1446.2, 1738.3 cm⁻¹; m/z (ESI) 366.5 (M−H)⁻.

Example 3

(±) (R)-Ethyl 2-((2R,3R)-2-cyano-tetrahydrofuran-3-yl)-2-(tosylamino)acetate (5b). To a mixture of freshly distilled α-N-tosyl imino ester (1) (153 mg, 0.60 mmol) and 2,3-dihydrofuran (50.5 mg, 0.72 mmol) in dry CH₂Cl₂ (4.0 mL) at −78° C. was added a solution of TiCl₄ (1.0 M in CH₂Cl₂, 0.60 mmol) and the resulting yellow solution containing some precipitate were stirred at −78° C. for an hour. Trimethylsilyl cyanide (119 mg, 1.20 mmol) was added to the mixture at −78° C. and mixture was continuously stirred at −78° C. for 0.5 hour. The mixture was allowed to warm to 0° C. and stirred at 0° C. for 5.0 hours. Saturated sodium bicarbonate solution (10 mL) was used to quench the reaction at 0° C. The aqueous layer was extracted with ethyl acetate (3×10 mL). The combined organic extracts were dried over Na₂SO₄ and concentrated under reduced pressure. The residue was further purified by flash column chromatography on silica gel to afford (5b) (112.3 mg, 64% yield) as a yellow solid, Mp=105-107° C., Rf=0.34 (45% EtOAc in hexane); ¹H NMR (400 MHz, CDCl₃): δ 1.06 (t, J=7.1 Hz, 3H), 1.89 (m, 1H), 2.06 (m, 1H), 2.40 (s, 3H), 2.88 (m, 1H), 4.81-3.81 (m, 5H), 4.70 (d, J=5.7 Hz, 1H), 5.74 (d, J=9.4 Hz, 1H), 7.28 (d, J=8.4 Hz, 2H), 7.70 (d, J=8.4 Hz, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 13.8 (CH₃), 21.5 (CH₃), 27.6 (CH₂), 48.2 (CH), 55.5 (CH), 62.4 (CH₂), 67.9 (CH), 69.0 (CH₂), 118.4 (CN), 127.3 (CH), 129.8 (CH), 135.9 (C), 144.3 (C), 169.5 (CO); IR (film, NaCl), 578.2, 666.8, 815.4, 918.5, 1091.6, 1164.0, 1305.1, 1339.5, 1447.8, 1738.6, 2255.6, 2983.1 cm⁻¹; m/z (ESI) 375.2 (M⁺+Na).

Example 4

(±) (S)-Ethyl 2-((S)-tetrahydro-2H-pyran-3-yl)-2-(tosylamino)acetate (8). The procedure described for (3) was used for (8). α-N-tosyl imino ester (1) (255 mg, 1.0 mmol), 3,4-dihydro-2H-pyran (101 mg, 1.20 mmol), TiCl₄ (1M in CH₂Cl₂, 1.20 mmol) and triethylsilane (581.4 mg, 5.00 mmol) to afford (8) (334 mg, 98% yield) as a white solid, Mp=102.2-103.8° C., R_(f)=0.41 (50% EtOAc in hexane); ¹H NMR (400 MHz, CDCl₃): δ 1.06 (3H, t, J=7.1 Hz), 1.41 (ddd, J=23.4, 11.2, 4.1 Hz, 1H), 1.72-1.51 (m, 4H), 1.93 (m, 1H), 2.04 (s, 3H), 3.38-3.32 (m, 2H), 3.92-3.74 (m, 3H), 3.88 (q, J=7.1 Hz, 2H), 7.27 (d, J=8.2 Hz, 2H), 7.69 (d, J=8.2 Hz, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 13.9, 21.5, 24.6, 25.0, 38.8, 57.1, 61.8, 68.2, 69.8, 127.4, 129.6, 136.3, 143.8, 170.7; IR (film, NaCl) 559.3, 666.8, 1090.0, 1162.9, 1340.1, 1738.5, 2720.9, 2748.1, 2787.0 cm⁻¹; m/z (ESI) 342.1 (M+H)⁺.

Example 5

(±)(S)-Ethyl 2-((2S,3S)-2-allyl-tetrahydro-2H-pyran-3-yl)-2-(tosylamino)acetate (9a) and (±)(S)-ethyl 2-((2R,3S)-2-allyl-tetrahydro-2H-pyran-3-yl)-2-(tosylamino)acetate (10a). The procedure described for (5a) and (6a) was used for (9a) and (10a). α-N-tosyl imino ester (1) (128 mg, 0.50 mmol), 3,4-dihydro-2H-pyran (168 mg, 1.0 mmol), TiCl₄ (1M in CH₂Cl₂, 0.60 mmol) and allyltrimethylsilane (115 mg, 1.00 mmol) to afford unseparable mixture of (9a) and (10a) (178.5 mg, 94% yield) as a white solid, Mp=88-91° C., R_(f)=0.43 (50% EtOAc in hexane); ¹H NMR (400 MHz, CDCl₃): δ 1.00 (t, J=7.1 Hz, 3H, major), 1.07 (t, J=7.1 Hz, 3H, minor), 1.34 (m, 2H), 1.76 (m, 2H), 1.97 (m, 1H), 2.29 (m, 1H), 2.37 (s, 3H), 2.55 (s, 1H), 3.28 (m, 1H, major), 3.43 (m, 1H, major), 3.48 (m, 1H, minor), 3.54 (m, 1H, minor), 3.88 (m, 3H), 4.03 (d, J=8.8 Hz, 1H), 4.97 (m, 2H, minor), 5.08 (m, 2H, major), 5.24 (s, 1H), 5.68 (m, 1H, minor), 5.86 (m, 1H, major), 7.27 (d, J=7.9 Hz, 2H), 7.69 (d, J=7.9 Hz, 2H, major), 7.73 (d, J=7.9 Hz, 2H, minor); ¹³C NMR (100 MHz, CDCl₃) δ 13.8, 21.5, 23.3, 25.7, 33.2 (minor), 36.7 (major), 39.2 (minor), 41.6 (major), 55.9 (major), 56.7 (minor), 61.5 (minor), 61.8 (major), 65.2 (minor), 67.8 (major), 76.8, 117.0, 127.4, 129.6, 134.5, 136.1 (major), 136.8 (minor), 143.7 (minor), 143.8 (major), 170.5 (major), 171.3 (minor); IR (film, NaCl), 668.0, 815.4, 1089.22, 1163.24, 1340.1, 1738.1, 2931.1 cm⁻¹, m/z (ESI) 382.1 (M⁺+H), 404.2 (M⁺+Na).

Example 6

(±)(S)-ethyl 2-((2R,3S)-2-cyano-tetrahydro-2H-pyran-3-yl)-2-(tosylamino)acetate (9b) and (±)(S)-ethyl 2-((2S,3S)-2-cyano-tetrahydro-2H-pyran-3-yl)-2-(tosylamino)acetate (10b). The procedure described for 5b was used for 9b and 10b. α-N-tosyl imino ester 1 (153 mg, 0.600 mmol), 3,4-dihydro-2H-pyran (60.6 mg, 0.720 mmol), TiCl₄ (1M in CH₂Cl₂, 0.720 mmol) and trimethylsilyl cyanide (119 mg, 1.20 mmol) to afford unseparable mixture of 9b and 10b (180.9 mg, 99% yield) as a yellow solid, Mp=107-110° C., R_(f)=0.42 (45% EtOAc in hexane); ¹H NMR (400 MHz, CDCl₃): δ 1.048 (t, J=7.1 Hz, 3H, major), 1.054 (t, J=7.1 Hz, minor), 1.63-1.54 (br, 4H), 2.04 (br, 1H, minor), 2.19 (br, 1H, major), 2.38 (s, 3H), 3.43 (m, 1H, major), 3.70 (m, 1H, minor), 3.99-3.96 (m, 3H), 4.04 (dd, J=9.1, 3.8 Hz, 1H), 4.36 (d, J=9.3 Hz, major), 4.64 (d, J=4.3 Hz), 7.27 (d, J=8.2 Hz, 2H), 7.69 (d, J=8.2 Hz, 2H, minor), 7.72 (d, J=8.2 Hz, 2H, major); ¹³C NMR (100 MHz, CDCl₃) δ 13.7 (CH₃, minor), 13.8 (CH₃, minor), 21.5 (CH₃), 21.7 (CH₂, major), 23.0 (CH₂, minor), 23.5 (CH₂, major), 24.7 (CH₂, minor), 41.4 (CH, minor), 41.6 (CH, major), 55.5 (CH, major), 57.1 (minor), 62.3 (CH₂, minor), 62.6 (CH₂, major), 64.6 (CH₂, minor), 66.7 (CH, minor), 67.5 (CH, major), 67.6 (CH₂, major), 115.3 (CN, minor), 117.1 (CN, major), 127.3 (CH, minor), 127.5 (CH, major), 129.7 (CH, minor), 129.8 (CH, major), 135.4 (C, major), 136.3 (C, minor), 169.6 (CO, major), 169.7 (CO, minor); IR (film, NaCl), 548.2, 668.3, 815.3, 919.6, 1021.0, 1089.0, 1164.17, 1341.10, 1447.3, 1735.2, 2255.0, 2339.7, 2360.8, 2866.5, 2935.6 cm⁻¹; m/z (ESI) 367.3 (M⁺+H), 389.2 (M⁺+Na).

Example 7

(R)-ethyl 2-((3R,5R)-tetrahydro-5-phenylfuran-3-yl)-2-(tosylamino)acetate (13). To a mixture of freshly distilled α-N-tosyl imino ester (1) (76.6 mg, 0.300 mmol) and (R)-2,3-dihydro-2-phenylfuran (11) (52.6 mg, 0.360 mmol) in dry CH₂Cl₂ (3.0 mL) at −78° C. was added a solution of TiCl₄ (1.0 M in CH₂Cl₂, 0.36 mmol) and the resulting orange solution were stirred at −78° C. for 50 mins. Dry acetonitrile (61.6 mg, 1.50 mmol) was added at −78° C. and the mixture was stirred at −78° C. for 10 mins. Triethylsilane (174.4 mg, 1.50 mmol) was added and the mixture was stirred at −78° C. for an hour. Then the mixture was warmed to −20° C. and stirred at −20° C. for two hours. Then the mixture was recooled to −30° C. and quenched carefully with 10 mL ice-chilled saturated sodium bicarbonate solution. After the mixture was warmed to room temperature, the aqueous layer was extracted with dichloromethane (3×15 mL). The combined organic extracts were dried over Na₂SO₄ and concentrated under reduced pressure. The residue was further purified by flash column chromatography on silica gel to afford the α-N-tosylamino ester (13) (84.7 mg, 70% yield) as clear crystals, Mp=97-99° C., R_(f)=0.41 (hex:EtOAc=1:1), [α]²³ _(D)=−17.9° (c 1.03, CHCl₃); ¹H NMR (400 MHz, CDCl₃): δ 1.06 (t, J=7.3 Hz, 3H), 1.96 (m, 1H), 2.33 (m, 1H), 2.42 (s, 3H), 2.59 (m, 1H), 3.94-3.76 (m, 4H), 4.09 (dd, J=9.1, 7.3 Hz, 1H), 4.99 (t, J=7.0 Hz, 1H), 5.28 (d, J=9.9 Hz, 1H), 7.31 (m, 7H), 7.72 (d, J=6.7 Hz, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 13.9 (CH₃), 21.5 (CH₃), 36.7 (CH₂), 42.3 (CH), 56.7 (CH), 62.0 (CH₂), 69.8 (CH₂), 79.8 (CH), 125.4 (CH), 127.4 (CH), 128.4 (CH), 129.7 (CH), 136.3 (C), 142.6 (C), 143.9 (C), 170.9 (CO); FT-IR (film, NaCl), 562.1, 666.6, 701.4, 1026.3, 1163.3, 1339.2, 1494.6, 1599.1, 1736.2, 2872.4, 2981.7 cm⁻¹; m/z (ESI) 404.1 (M+H)⁺.

Example 8

(R)-Ethyl 2-((2R,3R,5R)-2-cyano-tetrahydro-5-phenylfuran-3-yl)-2-(tosylamino)acetate (14). To a mixture of freshly distilled α-N-tosyl imino ester (1) (76.6 mg, 0.300 mmol) and (R)-2,3-dihydro-2-phenylfuran (11) (52.6 mg, 0.360 mmol) in dry CH₂Cl₂ (3.0 mL) at −78° C. was added a solution of TiCl₄ (1.0 M in CH₂Cl₂, 0.36 mmol) and the resulting orange solution were stirred at −78° C. for an hour. Trimethylsilyl cyanide (59.5 mg, 0.60 mmol) was added to the mixture quickly at −78° C. and the mixture was continuously stirred at −78° C. for 0.5 hour. Then the mixture was allowed to warm to −20° C. and stirred at −20° C. for 5.0 hours. Ice-cooled saturated sodium bicarbonate solution (10 mL) was used to quench the reaction carefully at −20° C. The aqueous layer was extracted with dichloromethane (3×10 mL). The combined organic extracts were dried over Na₂SO₄ and concentrated under reduced pressure. The residue was further purified by flash column chromatography on silica gel to afford (14) (80.4 mg, 65% yield) as a yellow oil, R_(f)=0.28 (hex:EtOAc=1:1), [α]²³ _(D)=−17.2° (c 1.0, CHCl₃); ¹H NMR (400 MHz, CDCl₃): δ 1.06 (t, J=7.2 Hz, 3H), 2.09 (m, 1H), 2.43 (s, 3H), 2.45 (m, 1H), 2.92 (m, 1H), 3.95 (m, 3H), 4.82 (d, J=6.4 Hz, 1H), 5.18 (t, J=6.9 Hz, 1H), 5.54 (d, J=9.4 Hz, 1H), 7.30 (m, 7H), 7.74 (d, J=8.2 Hz, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 13.8 (CH₃), 21.6 (CH₃), 35.7 (CH₂), 47.6 (CH), 55.0 (CH), 62.8 (CH₂), 68.3 (CH), 81.8 (CH), 118.1 (CN), 125.4 (CH), 127.4 (CH), 128.0 (CH), 129.9 (CH), 135.6 (C), 140.3 (C), 144.4 (C), 169.6 (CO); FT-IR (film, NaCl), 553.7, 668.4, 815.2, 914.5, 1092.2, 1164.0, 1340.1, 1449.7, 1494.9, 1598.6, 1738.5, 2249.5 cm⁻¹; m/z (ESI) 427.4 (M−H)⁻.

Example 9

(R)-Ethyl 2-((2R,3R,5R)-2-allyl-tetrahydro-5-phenylfuran-3-yl)-2-(tosylamino)acetate (15). To a mixture of freshly distilled α-N-tosyl imino ester (1) (72.2 mg, 0.283 mmol) and (R)-2,3-dihydro-2-phenylfuran (11) (50.0 mg, 0.340 mmol) in dry CH₂Cl₂ (3.0 mL) at −78° C. was added a solution of TiCl₄ (1.0 M in CH₂Cl₂, 0.36 mmol) and the resulting orange solution were stirred at −78° C. for 50 mins. Dry acetonitrile (58.1 mg, 1.42 mmol) was added at −78° C. and the mixture was stirred at −78° C. for 10 mins. Allyltrimethylsilane (65.2 mg, 0.570 mmol) was added and the mixture was stirred at −78° C. for an hour. Then the mixture was warmed to −20° C. and stirred at −20° C. for two hours. Then the mixture was recooled to −30° C. and the reaction was quenched carefully with 10 mL ice-cooled saturated sodium bicarbonate solution. After the mixture was warmed to room temperature, the aqueous layer was extracted with dichloromethane (3×15 mL). The combined organic extracts were dried over Na₂SO₄ and concentrated under reduced pressure. The residue was further purified by flash column chromatography on silica gel to afford the α-N-tosylamino ester (15) (89.1 mg, 71% yield) as a yellow oil, R_(f)=0.38 (40% EtOAc in hexane), [α]²³ _(D)=−9.6° (c 1.0, CHCl₃); ¹H NMR (400 MHz, CDCl₃): δ 1.05 (t, J=7.1 Hz, 3H), 1.80 (m, 1H), 2.21 (m, 1H), 2.31 (m, 1H), 2.38 (m, 2H), 2.42 (s, 3H), 3.90 (m, 3H), 4.05 (m, 1H), 4.89 (t, J=7.7 Hz, 1H), 5.12 (m, 2H), 5.40 (d, J=9.9 Hz, 1H), 5.89 (m, 1H), 7.33-7.23 (m, 7H), 7.73 (d, J=8.3 Hz, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 13.8 (CH₃), 21.5 (CH₃), 36.1 (CH₂), 38.6 (CH₂), 45.9 (CH), 55.9 (CH), 62.0 (CH₂), 79.5 (CH), 79.6 (CH), 117.7 (CH₂), 125.7 (CH), 127.4 (CH), 128.3 (CH), 129.7 (CH), 134.1 (C), 136.3 (C), 142.1 (C), 144.0 (C), 171.0 (CO); FT-IR (film, NaCl), 545.1, 667.9, 816.2, 1025.4, 1093.9, 1163.2, 1349.2, 1746.9, 2980.6 cm⁻¹; m/z (ESI) 444.1 (M+H)⁺, 466.3 (M+Na)⁺.

Example 10

(R)-ethyl 2-((3R,5R)-tetrahydro-5-(naphthalen-2-yl)furan-3-yl)-2-(tosylamino)acetate (16). The procedure described for (13) was used for (16). α-N-tosyl imino ester (1) (76.6 mg, 0.300 mmol), (R)-2,3-dihydro-2-(naphthalen-2-yl)furan (12) (70.3 mg, 0.360 mmol), TiCl₄ (1M in CH₂Cl₂, 0.360 mmol), acetonitrile (61.6 mg, 1.50 mmol) and triethylsilane (174 mg, 1.50 mmol) to afford (16) (89.0 mg, 65% yield) as a yellow oil, R_(f)=0.40 (hex:EtOAc=1:1), [α]²³ _(D)=−25.2° (c 1.00, CHCl₃); ; ¹H NMR (500 MHz, CDCl₃): δ 1.07 (t, J=7.2 Hz, 3H), 2.04 (m, 1H), 2.40 (m, 1H), 2.41 (s, 3H), 2.64 (m, 1H), 3.87-3.93 (m, 4H), 4.17 (dd, J=9.0, 7.0 Hz, 2H), 5.17 (t, J=7.0 Hz, 1H,), 5.31 (d, J=9.5 Hz, 1H), 7.30 (d, J=8.0 Hz, 2H), 7.36 (dd, J=8.5, 1.5 Hz, 1H), 7.46 (m, 2H), 7.74 (d, J=8.0 Hz, 3H), 7.81 (d, J=8.5 Hz, 3H); ¹³C NMR (125 MHz, CDCl₃) δ 13.9 (CH₃), 21.6 (CH₃), 36.7 (CH₂), 42.4 (CH), 56.8 (CH), 62.0 (CH₂), 70.0 (CH₂), 80.0 (CH), 123.7 (CH), 123.9 (CH), 125.8 (CH), 126.2 (CH), 127.4 (CH), 127.7 (CH), 127.9 (CH), 128.3 (CH), 129.8 (CH), 132.8 (C), 133.2 (C), 136.4 (C), 140.0 (C), 144.0 (C), 171.0 (CO); FT-IR (film, NaCl) 550.9, 593.0, 675.2, 737.1, 817.5, 1029.7, 1091.7, 1161.9, 1349.3, 1599.0, 1743.8 cm⁻¹; m/z (ESI) 454.1 (M+H)⁺.

Example 11

(R)-ethyl 2-((2S,3R,5R)-2-cyano-tetrahydro-5-(naphthalen-2-yl)furan-3-yl)-2-(tosylamino)acetate (17). The procedure described for (5b) was used for (17). α-N-tosyl imino ester (1) (76.6 mg, 0.300 mmol), (R)-2,3-dihydro-2-(naphthalen-2-yl)furan (12) (70.3 mg, 0.360 mmol), TiCl₄ (1M in CH₂Cl₂, 0.36 mmol) and trimethylsilyl cyanide (89.3 mg, 0.900 mmol) to afford (17) (84.7 mg, 59% yield) as a yellow oil, R_(f)=0.40 (hex:EtOAc=1:1), [α]²³ _(D)=−55.2° (c 1.05, CHCl₃); ; ¹H NMR (400 MHz, CDCl₃): δ 1.05 (t, J=7.1 Hz, 3H), 2.19 (m, 1H), 2.41 (s, 3H), 2.52 (m, 1H), 2.97 (m, 1H), 3.97 (m, 3H), 4.90 (d, J=6.5 Hz, 1H), 5.35 (t, J=6.9 Hz, 1H), 5.70 (d, J=5.3 Hz, 1H), 7.31 (d, J=8.2 Hz, 2H), 7.39 (dd, J=8.6, 1.6 Hz, 1H), 7.48 (m, 2H), 7.76 (d, J=8.2 Hz, 2H), 7.82 (m, 4H); ¹³C NMR (100 MHz, CDCl₃) δ 13.8 (CH₃), 21.6 (CH₃), 35.6 (CH₂), 47.5 (CH), 55.0 (CH), 62.8 (CH₂), 68.4 (CH), 82.0 (CH), 118.2 (CN), 123.2 (CH), 124.4 (CH), 126.2 (CH), 126.4 (CH), 127.4 (CH), 127.7 (CH), 128.1 (CH), 128.6 (CH), 129.9 (CH), 133.0 (C), 135.7 (C), 137.6 (C), 144.4 (C), 169.6 (CO); FT-IR (film, NaCl), 667.6, 817.2, 1092.0, 1163.7, 1446.5, 1738.2, 2820.8, 2922.3 cm⁻¹; m/z (ESI) 477.5 (M−H)⁻.

Example 12

(R)-ethyl 2-((2R,3R,5R)-2-allyl-tetrahydro-5-(naphthalen-2-yl)furan-3-yl)-2-(tosylamino)acetate (18). The procedure described for (15) was used for (18). α-N-tosyl imino ester (1) (76.6 mg, 0.300 mmol), (R)-2,3-dihydro-2-(naphthalen-2-yl)furan (12) (70.6 mg, 0.360 mmol), TiCl₄ (1M in CH₂Cl₂, 0.36 mmol), acetonitrile (61.6 mg, 1.50 mmol) and allyltrimethylsilane (68.6 mg, 0.600 mmol) to afford (18) (104.8 mg, 71% yield) colorless oil, R_(f)=0.48 (Hex:EtOAc=3:2), [α]²³ _(D)=−17.0° (c 0.73, CHCl₃); ; ¹H NMR (500 MHz, CDCl₃): δ 1.06 (t, J=7.0 Hz, 3H), 1.87 (m, 1H), 2.29-2.39 (m, 2H), 2.42 (s, 3H), 2.48 (m, 2H), 3.87-3.97 (m, 3H), 4.13 (q, J=6.0 Hz, 1H), 5.07 (t, J=7.5 Hz, 1H), 5.14-5.21 (m, 2H), 5.41 (d, J=10.0 Hz, 1H), 5.92-5.98 (m, 1H), 7.31 (d, J=8.5 Hz, 2H), 7.40 (dd, J=8.5, 1.5 Hz, 1H), 7.46 (m, 2H), 7.74-7.82 (m, 6H); ¹³C NMR (125 MHz, CDCl₃) δ 13.9 (CH₃), 21.6 (CH₃), 36.0 (CH₂), 38.7 (CH₂), 46.0 (CH), 56.0 (CH), 62.0 (CH₂), 79.6 (CH), 79.9 (CH), 117.8 (CH₂), 123.9 (CH), 124.4 (CH), 125.8 (CH), 126.1 (CH), 127.5 (CH), 127.7 (CH), 128.0 (CH), 128.2 (CH), 129.8 (CH), 132.9 (C), 133.2 (C), 134.2 (CH), 136.3 (C), 139.6 (C), 144.0 (C), 171.0 (CO); FT-IR (film, NaCl) 499.4, 666.2, 815.7, 1024.4, 1161.81, 1348.4, 1744.2 cm⁻¹; m/z (ESI) 494.1 (M+H)⁺, 516.2 (M+Na)⁺.

Example 13

Deprotection of tosyl group from 5a. (5a) (84.8 mg, 0.231 mmol) was mixed with 1N LiOH (3.23 mL, 3.23 mmol) and THF (1.15 mL) and was stirred at room temperature for an hour. Then the solution was adjusted to pH=2 with 1N HCl. The aqueous layer was extracted with ethyl acetate (3×15 mL). The combined organic extracts were dried over anhydrous Na₂SO₄ and the solvent was removed in vacuum. The crude product was used for the next reaction without purification. Thus, to a flask equipped with a condenser were added the crude product from last step, sodium phosphate dibasic (179.4 mg, 1.26 mmol), methanol (5.0 mL) and 3% Na/Hg (2.95 g, 3.83 mmol). The mixture was refluxed for one day. Then sodium phosphate dibasic (179.4 mg, 1.26 mmol) and 3% Na/Hg (2.95 g, 3.83 mmol) were added. The mixture was refluxed for another day. Water (2.0 ml) was used to quench the reaction. Mercury was removed and washed with methanol. The solution was concentrated. The resulting solid was dissolved in 10 mL methanol and sodium phosphate dibasic was removed by filtration. After removing the solvent from the filtrate, the crude product was further purified by column chromatography on silica gel (eluent: CHCl₃:CH₃OH:aqueous ammonia=5:3:1) to afford the desired product (7a) (41.8 mg, 98% yield, two steps) as a white solid, R_(f)=0.36 (CHCl₃:CH₃OH:aqueous ammonia=5:3:1). ¹H NMR (500 MHz, CD₃OD): δ 1.86 (ddd, J=15.0, 12.5, 7.5 Hz, 1H), 2.08 (m, 1H), 2.25 (dt, J=14.5, 7.5 Hz, 1H), 2.40 (m, 1H), 2.45 (m, 1H), 3.54 (d, J=6.0 Hz), 3.81 (m, 2H), 3.97 (dt, J=11.0, 3.5 Hz, 1H), 5.06 (dt, J=10.5, 1.0 Hz, 1H), 5.13 (dd, J=15.5, 2.0 Hz, 1H), 5.86 (m, 1H); ¹³C NMR (125 MHz, CD₃OD), δ 28.0 (CH₂), 38.2 (CH₂), 44.6 (CH), 56.5 (CH), 66.0 (CH₂), 79.7 (CH), 116.5 (CH₂), 134.4 (CH), 171.9 (CO); FT-IR (film, NaCl), 575.4, 687.1, 1365.1, 1404.1, 1512.8, 1639.3 cm⁻¹; HRMS (ESI), Calcd for C₉H₁₅NO₃: m/z 186.1130 (M+H)⁺. found m/z 186.1127 (M+H)⁺.

Example 14

Determination of Diastereomeric Ratios. The chiral products (13)-(18) was reduced to primary alcohol with LiAlH₄ in ethyl ether at 0° C., then the crude product was coupled with (R)-Mosher acid using EDCI and DMAP. The coupling product was purified by flash chromatography and the ¹⁹F NMR spectra of the desired Mosher ester was taken to determine the de % with integration (Lee, J.; Kobayashi, Y.; Tezuka, K.; and Kishi Y. Org. Lett., 1999, 1, 2181-84).

TABLE 1 Inhibition of HIV Protease by compounds of the following formula

K_(i) No. R¹ R² R³ Y (nM) 1 1-naphthyl allyl H p-MePhSO₂ 0.70 2 Ph H H p-MePhSO₂ 0.75 3 1-naphthyl H H p-MePhSO₂ 0.72 4 Ph H isoBu p-MeOPhSO₂ >1000 5 PhCH₂ ally H p-MePhSO₂ 0.41 6 PhCH₂ H H p-MePhSO₂ 0.28 7 PhCH₂ H isoBu p-MePhSO₂ 19 8 m-MeOPh H H p-MePhSO₂ >1000 9 1-naphthyl allyl H p-MeOPhSO₂ 51 10 PhCH₂ H H p-MeOPhSO₂ 1.4 11 p-MeOPhCH₂ H H p-MePhSO₂ >10 12 p-MeOPhCH₂ allyl H p-MePhSO₂ 84 13 PhCH₂ H H p-MePhSO₂ 200 14 p-HOCH₂PhCH₂ H H p-MePhSO₂ 480 15 p-HOCH₂PhCH₂ allyl H p-MePhSO₂ 370 16 PhCH₂ H H p- >1000 HOCH₂PhSO₂ 17 Ph allyl H benzamide >1000 18 Ph allyl H p-FPhSO₂ >1000 19 Ph 2-N-benzylaminoethyl H p-MePhSO₂ 3 20 Ph 2-HO-2-Ph-ethyl H p-MePhSO₂ 670 single isomer 21 Ph 2-HO-2-Ph-ethyl H p-MePhSO₂ 4 diastereomeric mixture 22 Ph 2,3-dihydroxypropyl H p-MePhSO₂ 27 23 Ph

H p-MePhSO₂ >1000 24 Ph

H p-MePhSO₂ 500 25 Ph allyl H p-MePhSO₂ >1000 26 2-naphthyl 2-HO-2-Ph-ethyl H p-MePhSO₂ 150 single isomer, lower Rf 27 2-naphthyl 2-HO-2-Ph-ethyl H p-MePhSO₂ 480 single isomer, higher Rf 28 Ph allyl H

>1000 29 Ph 2-OH-3-N-morpholino- H p-MePhSO₂ >1000 propyl 30 Ph N-benzylaminomethyl H p-MePhSO₂ >1000 31 Ph

H p-MePhSO₂ >1000 32 Ph

H p-MePhSO₂ 500 33 Ph 1-E-propenyl H p-MePhSO₂ >1000 34 2-naphthyl allyl H p-MePhSO₂ 1000 35 p-methoxymethyl- allyl H p-MePhSO₂ >1000 Ph

TABLE 2 Inhibition of HIV Protease No. Compound K_(i) (nM) 1

95 2

>1000 3

32 

1-52. (canceled)
 53. A compound of the formula

or a pharmaceutically acceptable salt thereof; wherein R¹ is alkyl, cycloalkyl, alkenyl, heteroalkyl, heterocyclyl, heterocyclylalkyl, aryl, arylalkyl, heteroaryl, or heteroarylalkyl, each of which is optionally substituted; X¹ is a bond, O, or an optionally substituted nitrogen; X² is CO or SO₂; R² is selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, arylalkoxy, amino, aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, each of which is optionally substituted; or R² is a pro-drug moiety; R³ is hydrogen or alkyl; R⁴ and R⁵ are, in each instance, independently selected from the group consisting of hydrogen, alkyl, heteroalkyl, alkenyl, alkoxy, amino, aminoalkyl, thioalkyl, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, hydroxyalkyl, nitrile, cyanoalkyl, carboxylic acid or a derivative thereof, and alkylcarboxylic acid or a derivative thereof, each of which is optionally substituted; or R⁴ and R⁵ are taken together with the attached atoms to foam a carbocycle or heterocycle; X, Y, and Z are taken together with the attached atoms to form a heterocycle or heterobicycle, each of which is optionally substituted; or X, Y, Z, and R⁵ are taken together with the attached atoms to form an optionally substituted heterobicycle; providing that X, Y, Z, R⁵, and the attached atoms do not comprise O—O or O—S; and Q is selected from the group consisting of heteroalkyl, hydroxyalkyl, and carboxylic acid or a derivative thereof; providing that the compound is not of the formulae

wherein R⁵ is hydrogen, cyano or CH₂CH═CH₂; n is 1 or 2; R^(x) is 1-naphthyl or phenyl; and R^(y) is tosyl or hydrogen.
 54. The compound of claim 53 wherein X, Y, and Z are each independently selected from the group consisting of a bond, O, S, S(O), SO₂, optionally substituted nitrogen, and (CR⁴R⁵)_(m), where m is 1 to about
 3. 55. The compound of claim 53 wherein X, Y, and Z are taken together with the attached atoms to form a 5 to 8 membered heterocycle containing 1 or 2 oxygen atoms.
 56. The compound of claim 53 wherein X, Y, and Z are taken together with the attached atoms to form a 5 to 8 membered heterocycle containing 1 oxygen and 1 nitrogen atom.
 57. The compound of claim 53 wherein X, Y, and Z are taken together with the attached atoms to form a tetrahydrofuran, dioxolane, tetrahydropyran, dioxane, morpholine, or oxepane, each of which is optionally substituted.
 58. The compound of claim 53 wherein Z and R⁴ are taken together with the attached atoms to form an optionally substituted oxabicyclo-[3.2.1]-octane.
 59. The compound of claim 53 wherein one of X, Y, or Z is O or NR^(2a), where R^(2a) is selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, arylalkoxy, amino, alkylthio, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, each of which is optionally substituted; or R^(2a) is a pro-drug moiety; and the others of X, Y, and Z are selected from the group consisting of a bond and (CR⁴R⁵)_(m), where m is 1 to about
 3. 60. The compound of claim 53 wherein X is O; Y is (CR⁴R⁵)_(m), where m is 1 to about 3; and Z is a bond.
 61. The compound of claim 53 wherein Y is O; and X and Z are each (CR⁴R⁵)_(m), where m is 1 to about
 3. 62. The compound of claim 53 wherein each of X and Y is (CR⁴R⁵)_(m), where m is 1; and Z is a bond.
 63. The compound of claim 53 wherein each of X, Y, and Z is (CR⁴R⁵)_(m), where m is
 1. 64. The compound of claim 53 wherein Q is selected from the group consisting of —CH₂OR⁹, —CO₂R⁹, —CONR⁹R¹⁰, —C(O)SR⁹, —C(S)OR⁹, and —C(S)NR⁹R¹⁰; where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or one or both of R⁹ and R¹⁰ is a pro-drug moiety; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocycle.
 65. The compound of claim 64 wherein Q is CO₂R⁹.
 66. The compound of claim 53 wherein R¹ is optionally substituted aryl.
 67. The compound of claim 53 wherein X¹ is O and X² is C(O).
 68. The compound of claim 53 wherein X¹ is a bond and X² is S(O)₂.
 69. The compound of claim 53 wherein R² is H.
 70. The compound of claim 53 wherein R³ is H.
 71. The compound of claim 53 wherein R⁴ and R⁵ are each independently selected from the group consisting of H, alkyl, CN, aryl, heteroaryl, heteroalkyl, arylalkyl, arylheteroalkyl, and heterocyclyl, each of which is optionally substituted.
 72. The compound of claim 53 wherein one or more of R⁴ and R⁵ is alkyl substituted with a carboxylic acid or derivative thereof.
 73. The compound of claim 53 wherein Q is CO₂R⁹, R¹ is optionally substituted aryl, X¹ is a bond, and X² is S(O)₂.
 74. The compound of claim 53 of the formula

or a pharmaceutically acceptable salt thereof; wherein R⁵ is selected from the group consisting of hydrogen, alkyl, heteroalkyl, cycloheteroalkyl, alkenyl, alkoxy, optionally substituted amino, thioalkyl, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, hydroxyalkyl, alkoxyalkyl, aminoalkyl, nitrile, cyanoalkyl, carboxylic acid, or a derivative thereof, and alkylcarboxylic acid, or a derivative thereof, each of which is optionally substituted; R⁷ is selected from the group consisting of hydrogen, hydroxy, alkoxy, optionally substituted alkyl, heteroalkyl, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted alkylheteroaryl, optionally substituted heteroarylalkyl, and NR⁹R¹⁰, where R⁹ and R¹⁰ are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, heteroalkyl, and arylalkyl; or R⁹ and R¹⁰ together with the nitrogen to which they are attached form an optionally substituted heterocyclyl; R⁸ is selected from the group consisting of hydrogen, alkyl, cycloalkyl, heterocyclyl, alkenyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, and alkylheteroaryl, each of which is optionally substituted; and R¹¹ is hydrogen, alkyl, arylalkyl, or a pro-drug moiety.
 75. The compound of claim 74 wherein R⁸ is optionally substituted aryl.
 76. The compound of claim 74 wherein R⁸ is naphthyl, quinolinyl or phenyl, each of which is optionally substituted.
 77. The compound of claim 53 of the formula

or a pharmaceutically acceptable salt thereof; wherein R^(a) represents from 0 to 3 substituents independently selected in each instance from the group consisting of hydroxy, alkyl, heteroalkyl, alkoxy, aryl, arylalkyl, hydroxy, optionally substituted amino, and thioalkyl, each of which is optionally substituted, or two vicinal R^(a) together with the attached carbons form a fused ring.
 78. The compound of claim 77 wherein X² is SO₂; X¹ is a bond; R³ is hydrogen; R¹ is aryl; and Q is a carboxylic acid or a derivative thereof.
 79. A composition comprising a therapeutically effective amount for treating a patient in need of relief from HIV, AIDS, or an AIDS-related disease of a compound of the formula

or a pharmaceutically acceptable salt thereof; wherein R¹ is alkyl, cycloalkyl, alkenyl, heteroalkyl, heterocyclyl, heterocyclylalkyl, aryl, arylalkyl, heteroaryl, or heteroarylalkyl, each of which is optionally substituted; X¹ is a bond, O, or an optionally substituted nitrogen; X² is CO or SO₂; R² is selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, arylalkoxy, amino, aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, each of which is optionally substituted; or R² is a pro-drug moiety; R³ is hydrogen or alkyl; R⁴ and R⁵ are, in each instance, independently selected from the group consisting of hydrogen, alkyl, heteroalkyl, alkenyl, alkoxy, amino, aminoalkyl, thioalkyl, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, hydroxyalkyl, nitrile, cyanoalkyl, carboxylic acid or a derivative thereof, and alkylcarboxylic acid or a derivative thereof, each of which is optionally substituted; or R⁴ and R⁵ are taken together with the attached atoms to form a carbocycle or heterocycle; X, Y, and Z are taken together with the attached atoms to form a heterocycle or heterobicycle, each of which is optionally substituted; or X, Y, Z, and R⁵ are taken together with the attached atoms to form an optionally substituted heterobicycle; providing that X, Y, Z, R⁵, and the attached atoms do not comprise O—O or O—S; and Q is selected from the group consisting of heteroalkyl, hydroxyalkyl, and carboxylic acid or a derivative thereof; and one or more carries, diluents, or excipients, or a combination thereof.
 80. A method for treating a patient in need of relief from HIV, AIDS, or an AIDS-related disease, the method comprising the step of administering to the patient a therapeutically effective amount of a compound of the formula

or a pharmaceutically acceptable salt thereof; wherein R¹ is alkyl, cycloalkyl, alkenyl, heteroalkyl, heterocyclyl, heterocyclylalkyl, aryl, arylalkyl, heteroaryl, or heteroarylalkyl, each of which is optionally substituted; X¹ is a bond, O, or an optionally substituted nitrogen; X² is CO or SO₂; R² is selected from the group consisting of hydrogen, alkyl, heteroalkyl, hydroxy, alkoxy, arylalkoxy, amino, aminoalkyl, alkylthio, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, each of which is optionally substituted; or R² is a pro-drug moiety; R³ is hydrogen or alkyl; R⁴ and R⁵ are, in each instance, independently selected from the group consisting of hydrogen, alkyl, heteroalkyl, alkenyl, alkoxy, amino, aminoalkyl, thioalkyl, heterocyclyl, heterocyclylalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, hydroxyalkyl, nitrile, cyanoalkyl, carboxylic acid or a derivative thereof, and alkylcarboxylic acid or a derivative thereof, each of which is optionally substituted; or R⁴ and R⁵ are taken together with the attached atoms to foam a carbocycle or heterocycle; X, Y, and Z are taken together with the attached atoms to form a heterocycle or heterobicycle, each of which is optionally substituted; or X, Y, Z, and R⁵ are taken together with the attached atoms to form an optionally substituted heterobicycle; providing that X, Y, Z, R⁵, and the attached atoms do not comprise O—O or O—S; and Q is selected from the group consisting of heteroalkyl, hydroxyalkyl, and carboxylic acid or a derivative thereof; or a composition comprising a therapeutically effective amount of the compound and one or more carries, diluents, or excipients, or a combination thereof. 